Help, I am confused

Hello ladies, 1st of all my period was always kinda regular 32-32 days, in January after my period ended we were ttc, in February instead of having the normal 6 days period, I had 3 days brownish discharge and now in March same again. My period was supposed to start two days ago and since this morning I have brownish discharge again but only when I wipe. Did it happen to anyone else before? I am a bit worried if everything is OK. I did 6 test already and all came back negative.. But where is my period then?!?!